package validator

import (
	"regexp"
	"sync"
)

var postCodePatternDict = map[string]string{
	"GB": `^GIR[ ]?0AA|((AB|AL|B|BA|BB|BD|BH|BL|BN|BR|BS|BT|CA|CB|CF|CH|CM|CO|CR|CT|CV|CW|DA|DD|DE|DG|DH|DL|DN|DT|DY|E|EC|EH|EN|EX|FK|FY|G|GL|GY|GU|HA|HD|HG|HP|HR|HS|HU|HX|IG|IM|IP|IV|JE|KA|KT|KW|KY|L|LA|LD|LE|LL|LN|LS|LU|M|ME|MK|ML|N|NE|NG|NN|NP|NR|NW|OL|OX|PA|PE|PH|PL|PO|PR|RG|RH|RM|S|SA|SE|SG|SK|SL|SM|SN|SO|SP|SR|SS|ST|SW|SY|TA|TD|TF|TN|TQ|TR|TS|TW|UB|W|WA|WC|WD|WF|WN|WR|WS|WV|YO|ZE)(\d[\dA-Z]?[ ]?\d[ABD-HJLN-UW-Z]{2}))|BFPO[ ]?\d{1,4}$`,
	"JE": `^JE\d[\dA-Z]?[ ]?\d[ABD-HJLN-UW-Z]{2}$`,
	"GG": `^GY\d[\dA-Z]?[ ]?\d[ABD-HJLN-UW-Z]{2}$`,
	"IM": `^IM\d[\dA-Z]?[ ]?\d[ABD-HJLN-UW-Z]{2}$`,
	"US": `^\d{5}([ \-]\d{4})?$`,
	"CA": `^[ABCEGHJKLMNPRSTVXY]\d[ABCEGHJ-NPRSTV-Z][ ]?\d[ABCEGHJ-NPRSTV-Z]\d$`,
	"DE": `^\d{5}$`,
	"JP": `^\d{3}-\d{4}$`,
	"FR": `^\d{2}[ ]?\d{3}$`,
	"AU": `^\d{4}$`,
	"IT": `^\d{5}$`,
	"CH": `^\d{4}$`,
	"AT": `^\d{4}$`,
	"ES": `^\d{5}$`,
	"NL": `^\d{4}[ ]?[A-Z]{2}$`,
	"BE": `^\d{4}$`,
	"DK": `^\d{4}$`,
	"SE": `^\d{3}[ ]?\d{2}$`,
	"NO": `^\d{4}$`,
	"BR": `^\d{5}[\-]?\d{3}$`,
	"PT": `^\d{4}([\-]\d{3})?$`,
	"FI": `^\d{5}$`,
	"AX": `^22\d{3}$`,
	"KR": `^\d{3}[\-]\d{3}$`,
	"CN": `^\d{6}$`,
	"TW": `^\d{3}(\d{2})?$`,
	"SG": `^\d{6}$`,
	"DZ": `^\d{5}$`,
	"AD": `^AD\d{3}$`,
	"AR": `^([A-HJ-NP-Z])?\d{4}([A-Z]{3})?$`,
	"AM": `^(37)?\d{4}$`,
	"AZ": `^\d{4}$`,
	"BH": `^((1[0-2]|[2-9])\d{2})?$`,
	"BD": `^\d{4}$`,
	"BB": `^(BB\d{5})?$`,
	"BY": `^\d{6}$`,
	"BM": `^[A-Z]{2}[ ]?[A-Z0-9]{2}$`,
	"BA": `^\d{5}$`,
	"IO": `^BBND 1ZZ$`,
	"BN": `^[A-Z]{2}[ ]?\d{4}$`,
	"BG": `^\d{4}$`,
	"KH": `^\d{5}$`,
	"CV": `^\d{4}$`,
	"CL": `^\d{7}$`,
	"CR": `^\d{4,5}|\d{3}-\d{4}$`,
	"HR": `^\d{5}$`,
	"CY": `^\d{4}$`,
	"CZ": `^\d{3}[ ]?\d{2}$`,
	"DO": `^\d{5}$`,
	"EC": `^([A-Z]\d{4}[A-Z]|(?:[A-Z]{2})?\d{6})?$`,
	"EG": `^\d{5}$`,
	"EE": `^\d{5}$`,
	"FO": `^\d{3}$`,
	"GE": `^\d{4}$`,
	"GR": `^\d{3}[ ]?\d{2}$`,
	"GL": `^39\d{2}$`,
	"GT": `^\d{5}$`,
	"HT": `^\d{4}$`,
	"HN": `^(?:\d{5})?$`,
	"HU": `^\d{4}$`,
	"IS": `^\d{3}$`,
	"IN": `^\d{6}$`,
	"ID": `^\d{5}$`,
	"IL": `^\d{5}$`,
	"JO": `^\d{5}$`,
	"KZ": `^\d{6}$`,
	"KE": `^\d{5}$`,
	"KW": `^\d{5}$`,
	"LA": `^\d{5}$`,
	"LV": `^\d{4}$`,
	"LB": `^(\d{4}([ ]?\d{4})?)?$`,
	"LI": `^(948[5-9])|(949[0-7])$`,
	"LT": `^\d{5}$`,
	"LU": `^\d{4}$`,
	"MK": `^\d{4}$`,
	"MY": `^\d{5}$`,
	"MV": `^\d{5}$`,
	"MT": `^[A-Z]{3}[ ]?\d{2,4}$`,
	"MU": `^(\d{3}[A-Z]{2}\d{3})?$`,
	"MX": `^\d{5}$`,
	"MD": `^\d{4}$`,
	"MC": `^980\d{2}$`,
	"MA": `^\d{5}$`,
	"NP": `^\d{5}$`,
	"NZ": `^\d{4}$`,
	"NI": `^((\d{4}-)?\d{3}-\d{3}(-\d{1})?)?$`,
	"NG": `^(\d{6})?$`,
	"OM": `^(PC )?\d{3}$`,
	"PK": `^\d{5}$`,
	"PY": `^\d{4}$`,
	"PH": `^\d{4}$`,
	"PL": `^\d{2}-\d{3}$`,
	"PR": `^00[679]\d{2}([ \-]\d{4})?$`,
	"RO": `^\d{6}$`,
	"RU": `^\d{6}$`,
	"SM": `^4789\d$`,
	"SA": `^\d{5}$`,
	"SN": `^\d{5}$`,
	"SK": `^\d{3}[ ]?\d{2}$`,
	"SI": `^\d{4}$`,
	"ZA": `^\d{4}$`,
	"LK": `^\d{5}$`,
	"TJ": `^\d{6}$`,
	"TH": `^\d{5}$`,
	"TN": `^\d{4}$`,
	"TR": `^\d{5}$`,
	"TM": `^\d{6}$`,
	"UA": `^\d{5}$`,
	"UY": `^\d{5}$`,
	"UZ": `^\d{6}$`,
	"VA": `^00120$`,
	"VE": `^\d{4}$`,
	"ZM": `^\d{5}$`,
	"AS": `^96799$`,
	"CC": `^6799$`,
	"CK": `^\d{4}$`,
	"RS": `^\d{6}$`,
	"ME": `^8\d{4}$`,
	"CS": `^\d{5}$`,
	"YU": `^\d{5}$`,
	"CX": `^6798$`,
	"ET": `^\d{4}$`,
	"FK": `^FIQQ 1ZZ$`,
	"NF": `^2899$`,
	"FM": `^(9694[1-4])([ \-]\d{4})?$`,
	"GF": `^9[78]3\d{2}$`,
	"GN": `^\d{3}$`,
	"GP": `^9[78][01]\d{2}$`,
	"GS": `^SIQQ 1ZZ$`,
	"GU": `^969[123]\d([ \-]\d{4})?$`,
	"GW": `^\d{4}$`,
	"HM": `^\d{4}$`,
	"IQ": `^\d{5}$`,
	"KG": `^\d{6}$`,
	"LR": `^\d{4}$`,
	"LS": `^\d{3}$`,
	"MG": `^\d{3}$`,
	"MH": `^969[67]\d([ \-]\d{4})?$`,
	"MN": `^\d{6}$`,
	"MP": `^9695[012]([ \-]\d{4})?$`,
	"MQ": `^9[78]2\d{2}$`,
	"NC": `^988\d{2}$`,
	"NE": `^\d{4}$`,
	"VI": `^008(([0-4]\d)|(5[01]))([ \-]\d{4})?$`,
	"VN": `^[0-9]{1,6}$`,
	"PF": `^987\d{2}$`,
	"PG": `^\d{3}$`,
	"PM": `^9[78]5\d{2}$`,
	"PN": `^PCRN 1ZZ$`,
	"PW": `^96940$`,
	"RE": `^9[78]4\d{2}$`,
	"SH": `^(ASCN|STHL) 1ZZ$`,
	"SJ": `^\d{4}$`,
	"SO": `^\d{5}$`,
	"SZ": `^[HLMS]\d{3}$`,
	"TC": `^TKCA 1ZZ$`,
	"WF": `^986\d{2}$`,
	"XK": `^\d{5}$`,
	"YT": `^976\d{2}$`,
}

var (
	postcodeRegexInit sync.Once
	postCodeRegexDict = map[string]*regexp.Regexp{}
)

func initPostcodes() {
	for countryCode, pattern := range postCodePatternDict {
		postCodeRegexDict[countryCode] = regexp.MustCompile(pattern)
	}
}
